Remote code execution in Microsoft XML Core Services

Published: 2012-06-12 | Updated: 2017-01-10
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2012-1889
CWE ID CWE-119
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Microsoft XML Core Services Subscribe
Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Memory corruption

Severity: Critical

CVSSv3: 8.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2012-1889

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to boundary error in XML Core Services (MSXML) when attempting to access an object in memory that has not been initialized. A remote attacker can create a specially crafted Web site, trick the victim into viewing it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft XML Core Services: 3.0, 4.0, 5.0, 6.0

CPE External links

https://technet.microsoft.com/en-us/library/security/ms12-043

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.